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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_DISPLAY_DISPLAY_CONFIGURATION_OBSERVER_H_
      6 #define CHROME_BROWSER_CHROMEOS_DISPLAY_DISPLAY_CONFIGURATION_OBSERVER_H_
      7 
      8 #include "ash/display/display_controller.h"
      9 #include "base/basictypes.h"
     10 #include "base/compiler_specific.h"
     11 
     12 namespace chromeos {
     13 
     14 // DisplayConfigurationObserver observes and saves
     15 // the change of display configurations.
     16 class DisplayConfigurationObserver : public ash::DisplayController::Observer {
     17  public:
     18   DisplayConfigurationObserver();
     19   virtual ~DisplayConfigurationObserver();
     20 
     21  protected:
     22   // ash::DisplayController::Observer overrides:
     23   virtual void OnDisplayConfigurationChanging() OVERRIDE;
     24   virtual void OnDisplayConfigurationChanged() OVERRIDE;
     25 
     26   DISALLOW_COPY_AND_ASSIGN(DisplayConfigurationObserver);
     27 };
     28 
     29 }  // namespace chromeos
     30 
     31 #endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_DISPLAY_CONFIGURATION_OBSERVER_H_
     32